character: John Dalton
topic: Atomic Theory and Early Models of Matter
grade: 12
subject: Chemistry
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character: Democritus
topic: Early Concepts of Atoms
grade: 12
subject: Chemistry
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character: J.J. Thomson
topic: Discovery of the Electron and Plum Pudding Model
grade: 12
subject: Chemistry
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character: Ernest Rutherford
topic: Gold Foil Experiment and Nucleus Model
grade: 12
subject: Chemistry
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